355 



Carditella aiUnsoni, Tenison- Woods, Tate and May, Proc. 

 Linn. See, New South Wales, vol. xxvi., 1901, part 3, p. 435, pi. 

 xxvii., f. 107. 



Cuna athinsoni. Tenison-Woods, Hedlev and May, Records 

 Austr. Mils., vol. vii., No. 2, 1908, p. 113, 100 fathoms off Cape 

 Pillar, Tasm. 



Dredged Gulf St. Vincent, under 22 fathoms, many 

 whole and valves; 110 fathoms off Beachport, one valve; 130 

 fathoms off Cape Jaffa, five good valves. 



Some examples have very fine concentric striae and fewer 

 marginal denticulations ; others seem very solid, probably 

 from senility; and one variety is much narrower and more 

 solid, and has a broad solid hinge-plate : but the examples 

 were too few to create a new species from them. 



Cuna hamata, Hedley and ]\[ay. 



Cuna hamata, Hedley and Mav. Records Austr. Mus., 

 vol. vii., No. 2, 1908, p. 124, pi. xxv."^, f. 33-36. 'lype locality.— 

 100 fathoms, off Cape Pillar, Tasmania. 



Dredged off Beachport in 40 fathoms, one alive, eighty- 

 six good valves; 49 fathoms, ten poor valves; 100 fathoms, 

 fifteen good valves; 150 fathoms, sixty-five good valves; 

 north-west of Cape Borda, 62 fathoms, ten poor valves; off 

 Cape Jaffa, 130 fathoms, thirty-nine good valves. It has 

 evidently a wide range in depth, though none were taken 

 in 200 or 300 fathoms. 



During life it is of a translucent horn colour, opaque 

 white when dead. 



Cuna obliquissima, Tate, sp. 

 Cardita ohUquissima, Tate, Trans. Roy. Soc, S. Austr., vol. 

 ix., 1887, p. 70, pi. v., f. 9. Type locality.— 22 fathoms, En- 

 counter Bay. 



Dredged at different depths in Gulf St. Vincent and 

 Backstairs Passage ; seven miles south-west of Newland Head 

 in 20 fathoms, one alive, of faint pink tint; off Beachport in 

 40 fathoms, twelve good valves; in 49 fathoms, seventeen 

 poor valves; off Cape Borda in 55 fathoms, one whole and 

 twenty-five good valves; in 62 fathoms, four whole and three 

 valves, all poor; off Beachport in 110 fathoms, nine valves, in 

 moderate condition; in 150 fathoms, two valves, moderate. 

 This lives chiefly in water up to 25 fathoms, and is in poor 

 state above 60 fathoms, and not found above 150. 



In addition to the stout 'four or five radial riblets" on 

 the posterior slope noted by Tate, living shells show fine 

 axial riblets over the whole surface, quite to the anterior mar- 

 gin. The "distant concentric grooves" do not correspond in 

 direction with the fine microscopic accremental striae, but cut 

 them obliquely from the front downwards and backwards, 

 i2 



